Dear statalist-ers,
Here is the issue I have been having:
And this goes on until I break it. The wso3 variable is scaled and its stats are as follows:
I am just wondering if there is something I am missing about running this panel tobit model? Perhaps I have too many zeros?
I am running Stata 14.2 on OSX 10.12.4.
Thanks for your help in advance!
Rohit
Here is the issue I have been having:
Code:
. xttobit wso3, ll(0) Obtaining starting values for full model: Iteration 0: log likelihood = -3239882.4 Iteration 1: log likelihood = -3239877.7 Iteration 2: log likelihood = -3239877.5 Iteration 3: log likelihood = -3239877.5 Fitting full model: Iteration 0: log likelihood = -1314850.5 (not concave) Iteration 1: log likelihood = -1311573.7 (not concave) Iteration 2: log likelihood = -1309937.6 (not concave) Iteration 3: log likelihood = -1309896.8 (not concave) Iteration 4: log likelihood = -1309880.5 (not concave) Iteration 5: log likelihood = -1309874 (not concave) Iteration 6: log likelihood = -1309873.9 (not concave) Iteration 7: log likelihood = -1309873.9 (not concave) Iteration 8: log likelihood = -1309873.9 (not concave) Iteration 9: log likelihood = -1309873.9 (not concave) Iteration 10: log likelihood = -1309873.9 (not concave) Iteration 11: log likelihood = -1309873.9 (not concave) Iteration 12: log likelihood = -1309873.9 (not concave) Iteration 13: log likelihood = -1309873.9 (not concave) Iteration 14: log likelihood = -1309873.9 (not concave) Iteration 15: log likelihood = -1309873.9 (not concave)
Code:
wso3
-------------------------------------------------------------
Percentiles Smallest
1% 0 0
5% 0 0
10% 0 0 Obs 1,996,424
25% 0 0 Sum of Wgt. 1,996,424
50% 0 Mean .0000403
Largest Std. Dev. .0011945
75% 0 .1363833
90% 0 .1363833 Variance 1.43e-06
95% 0 .1363833 Skewness 52.99425
99% .000257 .1981799 Kurtosis 3418.233
I am running Stata 14.2 on OSX 10.12.4.
Thanks for your help in advance!
Rohit